I'm assuming this is a part of the last dotpoint in topic 4 for economics - which requires evaluation of impacts of macroeconomic policies.
Essentially this is more of an essay question than a short answer and it is highly highly unlikely that you will be asked an "evaluate" question in short answer for the HSC where you're only required to write 100-150 words
I think for this specific question you would be expected to identify the surplus/deficit and the change from the previous budget in order to determine whether there is an expansionary effect or contractionary effect on the economy. Then you would very briefly outline a couple of specific examples from the budget and how they would impact on growth, unemployment, inflation and environmental management - i.e. the economic issues which are most relevant. - Though I can't really see how you would fit even this into 150 words... I hope this helps